package com.itheima.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.itheima.common.BaseContext;
import com.itheima.common.CustomException;
import com.itheima.dto.OrdersDto;
import com.itheima.entity.*;
import com.itheima.mapper.*;
import com.itheima.service.AddressBookService;
import com.itheima.service.OrderDetailService;
import com.itheima.service.OrderService;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.function.Consumer;

/**
 * <p>
 * 订单表 服务实现类
 * </p>
 *
 * @author Guoyh
 * @since 2022-08-23
 */
@Service
public class OrderServiceImpl extends ServiceImpl<OrderMapper, Orders> implements OrderService {

    @Autowired
    private ShoppingCartMapper shoppingCartMapper;

    @Autowired
    private UserMapper userMapper;

    @Autowired
    private AddressBookMapper addressBookMapper;

    @Autowired
    private OrderDetailService orderDetailService;

    @Override
    @Transactional
    public void submit(Orders orders) {
        //当前userId
        Long userId = BaseContext.getCurrentId();
        //查询当前用户的购物车数据
        LambdaQueryWrapper<ShoppingCart> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(ShoppingCart::getUserId,userId);
        List<ShoppingCart> shoppingCarts = shoppingCartMapper.selectList(queryWrapper);

        if (shoppingCarts == null || shoppingCarts.size() == 0) {
            throw new CustomException("购物车为空，不能下单");
        }
        //查询用户数据
        User user = userMapper.selectById(userId);
        //查询地址数据
        Long addressBookId = orders.getAddressBookId();
        AddressBook addressBook = addressBookMapper.selectById(addressBookId);

        if (addressBook == null) {
            throw new CustomException("用户地址信息有误，不能下单");
        }

        long orderId = IdWorker.getId();    //订单号

        List<OrderDetail> orderDetails = new ArrayList<>();
        AtomicInteger amount = new AtomicInteger(0);
        shoppingCarts.forEach(new Consumer<ShoppingCart>() {
            @Override
            public void accept(ShoppingCart item) {
                OrderDetail orderDetail = new OrderDetail();
                orderDetail.setOrderId(orderId);
                orderDetail.setNumber(item.getNumber());
                orderDetail.setDishFlavor(item.getDishFlavor());
                orderDetail.setDishId(item.getDishId());
                orderDetail.setSetmealId(item.getSetmealId());
                orderDetail.setName(item.getName());
                orderDetail.setImage(item.getImage());
                orderDetail.setAmount(item.getAmount());
                orderDetails.add(orderDetail);
                amount.addAndGet(item.getAmount().multiply(new BigDecimal(item.getNumber())).intValue());
            }
        });

        //向订单表插入数据，一条数据
        orders.setNumber(String.valueOf(orderId));
        orders.setOrderTime(LocalDateTime.now());
        orders.setCheckoutTime(LocalDateTime.now());
        orders.setStatus(2);
        orders.setAmount(new BigDecimal(amount.get()));//总金额
        orders.setUserId(userId);
        orders.setNumber(String.valueOf(orderId));
        orders.setUserName(user.getName());
        orders.setConsignee(addressBook.getConsignee());
        orders.setPhone(addressBook.getPhone());
        orders.setAddress((addressBook.getProvinceName() == null ? "" : addressBook.getProvinceName())
                + (addressBook.getCityName() == null ? "" : addressBook.getCityName())
                + (addressBook.getDistrictName() == null ? "" : addressBook.getDistrictName())
                + (addressBook.getDetail() == null ? "" : addressBook.getDetail()));

        this.save(orders);

        //向订单明细表插入数据，多条数据
        orderDetailService.saveBatch(orderDetails);

        //清空购物车数据
        shoppingCartMapper.delete(queryWrapper);
    }
}
